{
  "manageEntity": {
    "action": "Save",
    "entityId": "1586753185",
    "entityType": "Track",
    "nonce": "0x492e8275f6a5be3cd125da8cba2d55c288380fae8f85d9ea995d7f7a038dc74f",
    "signature": "0x8ad08a523ce7ad39286940b1a434c8a0913a87dede5e1a5c2f99d80055a196aa6f0ea8040f66f5e509ee98c79086db266c4cc8cbae939e022bc1827bd1c983a41b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}